SAT, 24.12.2021 14:50 makenziehook8
Given: sine (a) = four-fifths, startfraction pi over 2 endfraction < a < pi and sine (b) = startfraction negative 2 startroot 5 endroot over 5 endfraction, pi, pi < b < startfraction 3 pi over 2 endfraction what is the value of cos(a – b)?.
Answers: 2
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Given: sine (a) = four-fifths, startfraction pi over 2 endfraction < a < pi and sine (b) = sta...
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